doc: change implementation version number for console.debug

Following comment in PR nodejs#17033, and since this block of doc was first written
in this PR, changing the implementation version number for console.debug().
Making it v9.2.x for now, waiting for next release.

Fixes: nodejs#17033 (comment)

Author: Tiriel

doc/api/console.md

@@ -240,7 +240,7 @@ undefined
 
 ### console.debug(data[, ...args])
 <!-- YAML
-added: v8.0.0
+added: v9.2.x
 -->
 * `data` {any}
 * `...args` {any}